Filling thread cutter operating mechanism



May 16, 1950 B. w. BROUWER FILLING THREAD CUTTER OPERATING MECHANISM Filed Dec. 2'7, 1948 lNVENTOR BENJAMlN W. BROUWER ATTORNEY.

Patented May 16, 1950 UNITED STATES. PATENT OFFICE FILLING THREAD CUTTEROPERATING MECHANISM Benjamin Wk Brouwer, Auburn, Mass.-, assignor to Crompton &'KI10W18S Loom-Works, Worcester, Mass a "corporation of: Massachusetts Application December 27, 1948, Serial No. 67,439

the usual form of-weft replenishing mechanisma thread extendsfrom the shuttle eye along the front wall ofthe shuttle box to the selvage, and unless this thread is removed it may be drawn into the shed to form a thick place in the cloth.

Various controls have been proposed heretofore for removing this thread such as a pneumatic tube-locatedbetween the shuttle and the cloth and acting-to attract the thread before it has an opportunity to-be-whipped-intothe shed. With such-removers it is customary to-cut the thread near the eye of the shuttle,-'th'at part of the thread which remains attached to'theexhausted bobbin being drawn out of theshuttle eye as the bobbin is expelled from the shuttle box, and the other part of the thread extending toward the cloth being drawn into thethread remover.

In order to effect cutting-of this thread near the shuttle eye it has been proposed heretofore-to use scissorstype of cutters which may be mounted independently of the :lay and move to cutting position under control 'ofthe transfer arm, or the cutter may be mounted onthe lay and provision made to-project the cutter blades rearwardly through or at least-into a-slot or cavity in the shuttle across which the thread extends as the lay approaches front center. The invention'to be set forth herein relates more particularly to the latter type of-cutter mechanism.

In multicolor weft replenishing mechanisms the magnzine is set fora-transferring operation by a shaft which rocks from its normal positionto' transfer position to move a shuttle positioner feeler rearwardly and also lift the latch of the transferrer arm. The shaft is rocked to transfer positionbefore the lay reaches front center and then returns to-normal' position as the layer)- preaches front center. It is an important object of the present invention to provide means by which the operator mechanism for the threadcutter on the lay is controlled and positioned by connections with the rocker shaft. A lost motion connection permits the operator to remain in engagement with the-cutter as the shaft returns to its normal position.

Multicolor weft replenishing magazines generally employ in their construction a stud Serving 2 asa pivot ior the transferrer arm and also tie rods which hold inner and outer bobbin? guiding plates-of the magazine. It is a further object of he invention to extend thetransferrer arm supporting stud and preferablyone of the tie rods.

to-positions where they can support a'carrier for the operator of the thread cutter.

With these and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts hereinafter described andset'forth;

Inthe accompanying drawings, wherein a convenient embodiment of the invention is set forth:

Fig 1. shows a front elevationof a multicolor weft replenishing mechanismof well-known type together with adjacent parts of'the lay and shuttle box;

Fig. 2 is adiagrammatic view showing the manner in which'the previously mentioned rockershaft is moved from its normal position to transfor position,

Fig. 3 is an enlarged vertical section on line 3-3 of Fig. 1; and r Fig. 4-is a detailed enlarged vertical section on line-: i- -t of Fig. 1 showing the operator for the thread cutter.

The present inventionis shown as applied more particularly to a multicolor weft replenishing magazine M which has-inner and outer bobbin guiding plates it! and H held in spaced relation by means of theusual tierods, two of which are shown herein at it and as. H) is mounted-on a support I 3 fixed to the loom frame- 15. The plate it supports a top rocker shaft l6 and also a color slide designated generally at ll. Vertical bobbin releasers are mounted on theleft side of the end plate It as viewed in Fig.- l oneof which is indicated at IS. A pair of vertically spaced fingers l9 and 20 on the releaser cooperate with the color slide to raise and lower it.

An arm 2! is secured to the rocker shaft 18 and is connected to the upper end of a depending rod 2 la operatively connected to the shuttle position feel arts which may be of usual form. Ordinarily theshuttlefeeler is in forward position clear of the path'of the shuttle S as itmoves along the lay 23 toward the shuttle box 24, but when the rocker shaft l5 turns in a clockwise direction as viewed in Fig. 1 from its normal position to transfer position the rod 2! rises and moves the shuttle feeler 22 rearwardly. If the shuttle is misplaced it engages the shuttle position feeler and moves it forwardly to effect return'movement of the shaft i 5 to its normal positionand prevent The inner plate completion of or revoke the previously called replenishing operation.

The transferrer arm has a hub 25 pivotally mounted on a stud 21 which may conveniently be fastened to a part of the inner bobbin guiding plate 10. The transferrer arm has a transferrer latch 28, normally down, under control of a vertical rod 29 the upper end of which is attached to an arm 39 secured to shaft it. When the latter moves to transfer position rod 29 is depressed and the transferrer latch 28 is lifted to the transfer position to cause operation of the transferrer arm by the advancing lay.

The weft detector 3|, its detector shaft 32, the controller or chopper pin 33, the actuator or chopper lever 34, and the upright rod may all be of usual construction. The latter rod effects counter-clockwise rocking of the color slide I! when the detector indicates weft exhaustion, thereby lifting one of the releasers I8 so that a dog 36 on the upper end thereof, see Fig. 2, will overhang a bar or shelf 31 secured to the shaft l6. At a later time in the loom operation the color slide will be rocked clockwise as viewed in Fig. 1, and return releaser [8 to its normal down position. During this return motion dog 36 engages the shelf 3'! and rocks shaft [6 and parts carried thereby from normal to transfer position. The normal position of these parts is suggested in full lines and the transfer position thereof in full lines in Fig. 2.

The magazine is of common construction in multicolor weft replenishing looms and a further description is not thought necessary. It is believed sufficient to state that when a weft replenishing operation is initiated by the detector one of the slides 18 will rise, and when the depleted shuttle is about to return to the magazine end of the loom the previously raised bobbin releaser will descend to rock the rocker shaft I6 from its normal position to its transfer positions. If transfer occurs in normal manner the rocker shaft IE will be returned to its normal position, as by engagement of the shuttle position detector 22 with a part on the lay, as the latter approaches front center. If transfer is revoked by a misplaced shuttle shaft I6 returns to its normal position at an earlier time in the loom cycle and while the lay is an appreciable distance behind front center.

As shown more particularly in Fig. 3, the shuttle box 24 is provided with a front wall 40 having a hole 4| therein which registers with a hole 42 in the shuttle S when the latter is properly boxed.

The thread cutter mechanism C in the present instance is shown as being mounted on the box wall 40 and comprises a support 43 in which two scissors cutter blades 44 and 45 are slidably mounted. A pin 45 stationary on the support 43 passes through slots 4'! and 48 in the cutters 44 and 45, respectively, so that when the latter are moved rearwardly they pivot about a stud 49 carried by a slide mounted for back and forth motion on the support 43. Slide or carrier 5!] is normally held forwardly in any approved manner, as for instance by a spring 5| shown in Fig. 1.

The thread cutter of itself forms no part of the present invention and may be made as set forth in prior patent to Beaverstock No. 1,265,590. The slide 55 will normally be in forward position with respect to the shuttle box, or to the right as shown in Fig. 3, but when it is moved rearwardly the cutter blades pass through the aligned holes 4 41 and 42 and sever the weft thread W of the outgoing bobbin B.

Except as noted hereinafter the matter thus far described is of common construction and forms no part of the present invention. The thread cutter will be located near the right end of the shuttle box as viewed in Fig. 1 so that it may cut the thread W at a point adjacent to the thread delivery eye (not shown) in the front wall of the shuttle.

In carrying the present invention into effect provision is made for pushing the slide or cutter blade carrier 50 rearwardly on weft replenishing beats of the loom. The lower tie rod I3, see Fig. 1, is extended as at 55 and the transferrer arm supporting stud 2'] is also extended as at 56, so that both of these parts can have secured to them a support or plate 57. The latter, as shown in Fig. 3, has a slot 58 therein through which the extended end of the tie rod [3 projects and a set screw 59 in plate 5'! engages tie rod extension 55 to fix the position of the upper left end of plate 57, see Fig. 3. Plate 51 is also fastened to the extended end 56 of the transferrer supporting stud 27 by set screw 60.

In order to provide additional support for the transferrer stud 21 at a point intermediate its ends a stand 6| may be provided secured at its lower end as at 62 to a part of the structure 63 which supports the weft detector and detector shaft 32. The upper end of the stand 6| is provided with a hub 64 through which the stud 21 extends and in which it is tightly held by set screw 65.

Projecting to the left of the plate 57 as shown in Fig. l is an arm 66 provided with a stud 61 having pivotally mounted thereon a lever 68 the upper end of which is provided with a stud 69 and the lower end of which is provided with a radial slot 10, see Fig. 4.

A connector or wire H has an elongated horizontal loop 12 thereon which defines a slot 13 into which extends the stud 69 on the upper end of lever 58. Rod 1| extends to the left from stud 69, see Fig. 1, and is attached as at 14 to an arm 15 secured to the rocker shaft l6 by a set screw 16.

The lower end of lever 68 is operatively connected to a sliding operator, designated generally at 11, for the thread cutter C. This operator has a hub 18 mounted for horizontal sliding on a preferably cylindrical stud or guide 19 parallel to transferrer stud 21 and the right end of which, Fig. 1, is secured to the plate or mounting 51 as at 80. The left end of guide 19 is secured as at 8| to a link 82 the upper end of which is secured as at 83 to the transferrer stud 21. The plate 51 and link 82 jointly serve as a mounting means for the guide 19, which need not necessarily be cylindrical. The cutter operator T! has an arm 84 which extends diagonally upwardly and to the left, Fig. 3, and is provided with a V-shaped notch 85 which receives and is slidable along part of the transferrer stud 2'! to prevent angular motion of the operator 1'! around guide 19.

The lower part of the operator 1'! has mounted thereon a spring plunger 86 which slides through a cylindrical shell 87 the foot 88 of which is secured in vertically adjusted position to the depending arm 89 of the operator by a bolt 90. The spring plunger comprises a rod 9| having a head 92 slidable in shell 81 and receiving the left hand thrust of a compression spring 93 in the shell, see Fig. 4. Nuts 94 at the forward end of enemas:

the rod 9 I limit rearward'movement. :of .the head:v 92. Tappedi-in'to the head Ilsascrewr951which; is 1 adjustable longitudinally-of the .plunger rand is held in adusted positionby a lock nutsfii; The 1 head 9'! of the screw 95 is adaptedmforsengage ment with the .f cutter slide. 58:.

A torsion spring c iis interposed betweenlever; :1 68 and a collar #98 which; issfastened as: at 100130;? thestud fi'l. Theefie'ct of this springis-totend; tohold: lever 52? in thefull'line position shown. in Fig. 1, that .is ,=.with' the. operator 1 scr.ew:.-head: :91. out-of alignment -or register with the slide 5010f; l theicutter.

During-normal operation of thesloomxthe lay will' swing iback andgforth and asit approaches front center-position therslideefifl :of ithexthread. cutter will traverse aupathi to'the rightsof. the. operatomplunger. fittas-viewedwin Fig 1.:. When i shaft 2| fi lis rocked. as alreadydescribedfrom: its normal ..:posi-tio'n to its transfer iposition inziorder to sets-the -magazine. for-transfer :by-sliftingthe latch 28 'aandrrearward projection ofzithe shuttle positionfeeler 22,. arm z'i5iwillmove. to the-left; l Figlrl; and cause :lef t handmoveinent of the C011. nector H as vieweddn Fig. 1.1 Thesrightihand end ofthisxconnector. byitsengagement with the stud 69 Will rock lever 58 in a counter-clockwise direction, Fig. 1, and in doing so will cause the operator ll to slide to the right alongrstudpr guide 19. be in the operatin Position.shownindotted lines, Fig. 1. Movement of these parts to operating positionoccurs while the lay is in a position behind front center. Asthe-lay-advanoes the plungerBB being aligned orin-register-with the slid efl en gages the latterand moves it rearwardly=withrespect to the lay to effect cutting of the thread W. Compression spring 93 is stronger than the spring 5i and overpowers the latter during the cutting operation, but if by any circumstance some part of the cutter mechanism should be deranged and prevent rearward movement of the slide 50 with respect to the lay the spring 93 will compress to avoid breakage.

The cutter operation will be completed by the time the lay reaches front center, but by setting the screw 95 rearwardl cutting can be effected at an earlier point in the loom cycle, that is, be fore the lay reaches its front center position. If it be desired to effect earlier cutting the spring 93 may be compressed slightly as the lay reaches front center due to the fact that the slide 50 may have reached the limit of its rearward movement with respect to the lay before the latter is on front center.

The shaft IE will ordinarily be returned to its normal position as the lay approaches front center and right hand movement of the arm and connector ii to their normal full line position, Fig. 1, may occur while the head 9'! of screw 95 is still in engagement with the slide 50. The slot 13 is of sumcient length, however, so that the connector H can move from the dotted to the full line position shown in Fig. 1 without disturbing the stud 69 and lever 58, and the latter can remain in its dotted line position as shown in Fig. 1 so long as any considerable force is exerted between the slide 55 and the head 9'! of screw 95. As the lay moves rearwardly the slide 59 will move away from the screw 95 and the spring 98 will rock lever 68 from its operating dotted line position, Fig. 1, back to its inoperative full line position.

From the foregoing it will be seen that the invention sets forth simple means by which a The parts 68, H, Ti and-:JEWVilPIlOW-s;

threadscuttercmountedcon the lay carr'ibe .oper..-'

ated atl the. time ofca weft replenishin'g .operation means of. o operator i movable: into :registryv with the islide'wcarrierh-Sfirof Ethe threadrcuttin mechanism; Theioperatoris moved alonga guide which is parallel .tosthe :transferrer studnfl by 1 movement. of a. member: .of the -magazine, such.- as the rocking. of shaft" 6;: when: the member. moves from .itsinormal to. transfer. position; Thelarmz l5; rod 71 E- iand; th'el-lever z81constituteioperating connections between: shaft .1 ii andotheputterioperatorfll; but the invention is not necessarily lime ited itol these;partstasrmeans for: conveying mo tionzfrom shaft 16 .tozth'e operation The slot .13 .1 in the: connector .5! 1 permits lost :motion. whereby the shaft it can return-:to itsnormalposition1 while theoperator :is; still. engaged with: the :slide 58:: Thereafter, the 1 spring l 98 :-returns the sle'ver:

58 to its (normal. inoperative .positionaasthe lay, recedes sfromrfront center subsequent :toacomplee tion ofreplenishment of. the shuttle .S.i-.

Having thus; described the invention: .itnwilligbe vention.

Whatxis: olaimedas new .1316

1.: Incontrolzmechanism for. a thread cutter oni the :layof a .Weft replenishing: loom-having a re-= serve :bobbin magazinasa 1 member. on the: magae.

zine which moves fromithe normaLpositiontheree of: tatransfer-position before the lay reaches front;

center '.on-a rep1e'nishing beat'ofthe loom-,2 anrop'e' eratorc fore the.- cutter movably mountedfonizthe magazine sand.- normally out 30f: :register .with: the :1

thread: cutter.: and. operative connections. between;

said member: and. ioperatorneffective-tomovlathe;

latter into register with the thread cutter when the member moves from the normal position thereof to the transfer position thereof.

2. In control mechanism for a thread cutter on the lay of a weft replenishing loom provided with a reserve bobbin magazine having a stud for a transferrer arm, an elongated guide fixed with respect to said stud, an operator for the thread cutter slidable on said guide and normally out of register with the thread cutter, a member on the magazine which moves from the normal position thereof to transfer position before the lay reaches front center on a weft replenishing beat of the loom, and operative connections between said member and operator sliding the latter along said guide into register with the thread cutter when the member moves to the transfer position there of.

3. In control mechanism for a thread cutter on the lay of a weft replenishing loom provided with a reserve bobbin magazine having a stud for a transferrer arm, an elongated cylindrical guide parallel to and spaced from and fixed with respect to said stud, an operator for the thread cutter slidable on said guide and having a part engaging the stud to prevent angular motion of the operator around the guide, said operator being normally out of register with said thread cutter, a member on the magazine which moves from the normal position thereof to transfer position before the lay reaches front center on a Weft replenishing beat of the loom, and operative connections between said member and operator moving the latter along said guide into register with the thread cutter when said member moves to the transfer position thereof.

4. In control mechanism for a thread cutter on the lay of a weft replenishing loom provided with a reserve bobbin magazine having a stud for a. transferrer arm, an elongated guide parallel to said stud, mounting means secured to the stud supporting said guide, an operator for the thread cutter slidable on said guide and normally out of register with the thread cutter, a lever pivoted on part of said mounting means and operatively connected to said operator, a member on the magazine which moves from the normal position thereof to transfer position before the lay reaches front center on a weft replenishing beat of the loom, and connections between said member and lever effective when the member moves to the transfer position thereof to cause the lever to slide the operator along said guide into register with the thread cutter 5. In control mechanism for a thread cutter on the lay of a weft replenishing loom provided with a reserve bobbin magazine having a stud for a transferrer arm, an elongated guide parallel to said stud, mounting means secured to the stud supporting said guide, an operator for the thread cutter slidable on said guide and normally out of register with the thread cutter, a, lever pivoted on part of said mounting means and operatively connected to said operator, resilient means supported by the mounting means operatively connected to the lever and normally holding the latter in normal position such as to locate the operator in normal position and out of register with the thread cutter, a member on the magazine which moves from the normal position thereof to transfer position before the lay reaches front center on a weft replenishing beat of the loom, and connections between said member and lever effective to rock the latter against the action of said resilient means and slide the operator along said guide into register with the thread cutter, said resilient means thereafter returning the lever and operator to the normal positions thereof with the operator out of register with the thread cutter.

6. In control mechanism for a thread cutter on the lay of a weft replenishing loom provided with a reserve bobbin magazine, an operator for the thread cutter supported by and movable relatively to the magazine and being normally out of register with the thread cutter, a member on the magazine which moves from the normal position thereof to transfer position before the lay reaches front center on a weft replenishing beat of the loom and returns to normal position by the time the lay reaches front center on said replenishing beat of the loom, and means including a lost motion connection operatively connecting the member and operator effective to move the latter into register with the thread cutter when the member moves to the transfer position thereof, the operator due to said lost motion connection remaining in register and engagement with the thread cutter as the lay reaches front center and the member returns to the normal position thereof.

BENJAMIN W. BROUWER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 939,445 Ryon Nov. 9, 1909 1,194,278 Davis Aug. 8, 1916 2,207,080 Turner July 9, 1940 

